Rechargeable battery adapter



FIG. 1 is a perspective view of a rechargeable battery adapter, showing our new design.

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a bottom view thereof.

The rechargeable battery adapter portion shown in broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a rechargeable battery adapter, as shown and described. 